Water treatment method and water treatment apparatus

Abstract

In a water treatment apparatus, microorganisms propagating on wood charcoal are activated by micro-nano bubbles contained in treatment water. Water treatment is carried out with the activated microorganisms propagated on the wood charcoal. Thereby, a stable treatment is achieved. Organic matters adsorbed by the wood charcoal are decomposed by the activated microorganisms propagated on the wood charcoal.

1. A water treatment apparatus comprising:
 a water treatment water tank having a charcoal charging section,a water stream generation section and a micro-nano bubble generation section, 
 said charcoal charging section being constructed to contain a charcoal charge and said charcoal charging section being constructed and arranged to receive treatment water which is to be subjected to treatment; and 
 said water stream generation section contains a diffuser; and 
 said a micro-nano bubble generation section comprising a micro-nano bubble generator, 
 wherein 
 the water treatment tank further comprises a diapharm which partitions the water stream generation section and the charcoal changing section from each other and which extends vertically, and 
 the micro-nano bubble generation section is placed on the diaphragm within the water treatment tank. 
 
     
     
       2. A water treatment apparatus comprising:
 a water treatment water tank having a charcoal charging section which is constructed to contain a charcoal charge and said charcoal charging section being constructed and arranged to receive treatment water which is to be subjected to treatment; and 
 a micro-nano bubble generation section comprising a micro-nano bubble generator, 
 wherein 
 the charcoal charging section has 
 a first charging section in which granular activated carbon is charged and a second charging section in which wood charcoal is charged. 
 
     
     
       3. A water treatment apparatus comprising:
 a water treatment water tank having a charcoal charging section which is constructed to contain a charcoal charge and said charcoal charging section being constructed and arranged to receive treatment water which is to be subjected to treatment; and 
 a micro-nano bubble generation section comprising a micro-nano bubble generator, 
 wherein 
 the charcoal charging section has: 
 an upper section which contains polyvinylidene chloride filler material, 
 an intermediate section which contains granular activated carbon, and 
 a lower section which contains wood charcoal. 
 
     
     
       4. A water treatment apparatus comprising:
 a water treatment water tank having a charcoal charging section, a water stream generation section and a micro-nano bubble generation section, 
 said charcoal charging section being constructed to contain a charcoal charge and said charcoal charging section being constructed and arranged to receive treatment water which is to be subjected to treatment; and 
 said micro-nano bubble generation section comprises a micro-nano bubble generator, wherein 
 the water stream generation section has an agitator arranged such that said agitator is submerged in operation of said apparatus, 
 the water treatment water tank has a diaphragm which partitions the charcoal charging section and the water stream generation section from each other and which extends vertically, and 
 the micro-nano bubble generation section is placed on the diaphragm, and the agitator is placed at a through portion formed at a lower portion of the diaphragm. 
 
     
     
       5. The water treatment apparatus as set forth in  claim 1  or  4 , wherein the charcoal contains at least one kind of charcoal selected from the group consisting of wood charcoal, activated carbon and synthetic charcoal. 
     
     
       6. The water treatment apparatus as set forth in any one of  claims 1 ,  2 ,  3  and  4 , wherein
 the charcoal charging section has reticulate tubes placed in adjacency to the charcoal. 
 
     
     
       7. The water treatment apparatus as set forth in any one of  claims 1 ,  2 ,  3  or  4 , wherein
 the charcoal charging section further comprises a 
 section in which calcium carbonate mineral is charged. 
 
     
     
       8. The water treatment apparatus as set forth in any one of  claims 1 ,  2 ,  3  and  4 , further comprising
 an activated carbon adsorption tower into which the treatment water derived from the water treatment water tank is introduced. 
 
     
     
       9. A water treatment method, comprising the steps of:
 introducing treatment water, which is to be subjected to treatment, to a water treatment water tank of the apparatus of any one of  claims 1 ,  2 ,  3 , and  4 , wherein 
 micro-nano bubbles are produced in said treatment water; 
 and microorganisms are propagated on the charcoal; 
 said method further comprising treating the treatment water by the microorganisms propagated on the charcoal. 
 
     
     
       10. The water treatment method as set forth in  claim 9 , further comprising the step of:
 generating a water stream of the treatment water within the water treatment water tank. 
 
     
     
       11. The water treatment method of  claim 9 , wherein
 the treatment water introduced into the water treatment water tank contains organofluoric compounds. 
 
     
     
       12. The water treatment method of  claim 11 , wherein
 the organofluoric compounds are perfluorooctane sulfonate or perfluorooctanoic acid or a mixture of perfluorooctane sulfonate and perfluorooctanoic acid.